Switch-tongue fastening.



FIG. 2

H. G. ISENBERG.

SWITCH TONGUE FASTENING.

APPLICATION rum) NOV. 23, 1912.

1,074,365, Patented Sept. 30,1913.

FIG.1

WITNESSES INVENTOR WNFEED @TATES PATENT @FFKQE.

HEBBERTG. ISENIBERG OF JOHNSTOVIN,QBElQ'LfSYLVLANIA, 'ASSIGNOR TO THELORAIN STEEL 'COMPiANY,- 03F 'JQHNSTQVWN, BEN VANIA.

menses.

issrtvsum e conronerion or PENNSYL- swiroinroiveusrssrnnnve. I

- Specification of LettersP-atent.

Patented Sept. 30, 1913;.

Application filed November 23, 1912. Serial No. 733,138

To. all whom it mat concern:

larly .to the construction of switches .used

on street railways, and the invention'is designed to provide a switchhaving a new and useful arrangement of parts by the use of which theswitch tongueis pivotedand'i is held or maintained in .its pivotedposition onthe body portionofthe switchland; whereby compensation forwear is auto-5 matically taken upand-lost motion in the.

moving parts prevented.

and combination of parts whereby the switch tongue is positioned andmovablyi secured in place substantially as hereinafterdescribed andpointed out in the appended claims, reference being had to theaccompanying drawings in which:

Figure 1 is aplan showing a portion of; a switch structure embodying my.inven-; tion. Fig. 2 is a sideelevation on a larger scale, and partlyinsection, showing ill-d6. tail the switch tongue and tongue fastening asconstructed in accordance :with my invention. Fig. 3 is a transversesection: on a larger scale taken on the line IIIIII of Fig. 1. Fig. 4 isa sectional plan of the same, the section being :taken on the line. IVIVof Fig. 2. c

In the drawings the numeral 2 designates; the body of a switch structurehaving a; movable tongue or switch point 3 pivotallyi secured by one endin place thereon so as to; permit the free end to swing in the usual;known manner. Therear end or heel ofsthef switch tongue is providedwitha downwardly. extending pivot pin :4 arranged to project into theopening or hole5 provided for that purpose in the body portion of theswitch structure. One side of the pivot, pin 4 is cut away to provide arecess having a curved bottom surface "6 and having a depressed portion?therein the lower end of the depression b ing made semi-circular to forma seat for the swinging fastening bar 8 .by which the pivot pin islocked withinthe pivot pin openingfi.

At one side of the opening 5 for the pivot pin 4 is a recess-9 which isformed in the body portion 2 of the switch to extend transversely andcommunicates withthe interior ofthe box 10 whichis located at one sideofthe switch and is provided with an open top normally closedby means ofthe removable plate 11. The recess or slot 9 in the switch body,opposite the pivot pin opening 5, has a curved side wall .12 and avertical depression or groove 13 is .pr0- vided in thecurved side wall12.

The lower end of the fastening 8 is rounded so as to :enter and fit thesemicircular seat 7 provided therefor in the bottom of the .recessin theside of the pivot 1 pin .4 and the outer swinging end of the With thisand other-objects in view, as; will appear hereinafter my inventioncon-j sists in the novel construction, arrangement fastening Sisarranged to. engage with the curved sidewall 12 in .therecess 9 When the"parts are assembled. A tongue 14 on the swinging end of the fasteningbar 8 proj ects into the slot or groove 13 in the curved side wall 12 soas to hold the bar 8 in position and the curvature of the side wall 12is made. eccentric tolthe radius defining the travel of-the outer end ofthe fastening bar 8 when in position in its seat 7 in thepivot pin 4, aswill be more fully described here- .inafter.

The parts being constructed as shown,

the pivot pin 4 on "the heel of the switch tongue 3 is inserted withinthe opening 5 provided therefor in the switch body 2 and, ;the coverplate 11 forthe box 10 having been removed, the fastening bar 8 isinserted through the opening connectingthe 'box 10 with the recess 9until its lowerend is in engagement with the seat '2' therefor in therecess formed in one sideof the pivot pin 4. Theswinging outer end ofthe fastening Sis then caused to swing forwardly or downwardly untilinthe position shown in Fig. ,2 and the outer end of this fastening 8 byengagement with the eccentrically curved side wall 12 of the recess 9will wedge and hold the pivot pin in contact with the engaging surfaceof the opening 5 in theswitch structure 2. The bottom 6 of the recess inthe pivot pinbeing curved permits the slight axially swinging move mentof the pin in its seat necessary to allow the sidewise swinging movementof the switch tongue. The fastening bar 8 when in such position willprevent the swltch tongue 3 from lifting or being lifted from the switchbody 2 until after the fastening bar 8 has been removed from itsoperative position in which its opposite ends engage with its seat 7 inthe side of the pin 4; and the curved surface 12 within the recess 9.WVhen, after continued use, the pivot pin 4 becomes worn or when forother reasons there is lost motion between the pivot pin and the opening5 in which it is placed, the jarring of the cars passing over the switchwill cause the outer swinging end of the fastening bar 8 to graduallyfall downwardly and, as it is free to move by gravity, cause thefastening 8 to at all times hold the pin 4 tightly in engagement withthe engaging surfaces of the opening 5 and in this way any lost motionbetween the pivot pin on the switch tongue and its seat in the switchstructure will be taken up.

The advantages of my invention will be apparent to those skilled in theart. By means of my improved apparatus the swinging switch tongue issecurely held in position in the body of the switch structure andcompensation for wear is automatically effected so that lost motion inthe joint be tween the switch tongue and its seat is prevented andovercome. The switch tongue is locked in position without the use ofbolts or nuts while still readily detachable when required.

It will be obvious that various changes may be made in the details ofconstruction and arrangement without departing from the spirit and scopeof my invention as defined in and by the appended claims.

I claim 1. In a railway switch a switch body having a pivot pin openingtherein, a switch tongue having a pivot pin extending into said opening,registering recesses in adjacent faces of the pivot pin and pivot pinopening, and a tongue fastening comprising a locking bar looselypositioned within said registering recesses and arranged to secure theswitch tongue in position on the switch body.

2. In a railway switch a switch body having a pivot pin opening therein,a switch tongue having a pivot pin extending into said opening,registering recesses in adjacent faces of the pivot pin and pivot pinopening, and a tongue fastening comprising a locking bar removablysecured within said registering recesses and arranged to engage theopposite walls defining the depth of said recesses to secure the switchtongue in position on the switch body, said switch body having atransverse recess communicating with the registering recesses throughwhich the removably locking bar is inserted andremoved. i

3. Ina railway switch a switch body having a pivot pin opening therein,a switch tongue having a pivot pin extending into said opening,registering recesses in acent faces of the pivot pin and pivot pinopening, and a tongue fastening comprising a locking bar positionedwithin said recesses, the

ends of said bar engaging with the walls defining the depth of saidrecesses to secure the pivot pin in position in the pivot pin opening.

. 4. In a railway switch a switch body hav-. ing a pivot pin openingtherein, a switch tongue having a pivot pin extending into said opening,registering recesses in adjacent faces of the pivot pin and pivot pinopening,.and a tongue fastening comprising alocking bar within therecesses, the ends of said bar engaging with the walls of the recessesto prevent removal of the switch tongue from the switch body, and thewall of the recesses in the switch body engaging with the pin beingcurved to wedge the bar in looking position. 7 v V v 5. In a railwayswitch a switch body having a .pivot pin opening therein, a switchtongue having a pivot pin extending into said opening, .and a tonguefastening within said recesses, the ends of said bar engaging with thewalls of the recesses to prevent disengagement of the switch tongue andswitch body, registering recesses in adjacent faces of the pivot pinopening, the side wall of the recess in said switch body engaging withthe locking bar being curved to wedge the bar in looking position andhaving a groove to receive the tongue on the end of said locking bar.

6. In a railway switch a switch body having a pivot pin opening therein,a switch tongue having a pivot pin extending into said opening,registering recesses in adjacent faces of the pivot pin andpivot pinopening, and a tongue fastening com- 7 prising a pivoted locking barwithin the recesses, the side wall of the recess in the switch tonguebody being curved eccen-- trically to the path of swinging movement ofthe free end of the locking bar to wedge the bar in position and holdthe switch tongue in place on the switch body.

In testimony whereof, I have hereunto set my hand.

HERBERT Gr. ISENBERGJ lVitnesses:

W. MILT BROWN, H. W. SMITH.

Copies of this patent may be obtained for five cents each, by address ngWashington, D. G.

the Commissioner of Patent:

